What is the charging standard for trademark infringement lawyers?

At present, there is no uniform standard for trademark infringement lawyers, mainly face-to-face consultation between the parties and lawyers. General law firms should consider the following main factors when negotiating lawyer service fees with clients: (1) working hours spent; (two) the difficulty of legal affairs; (3) the client's affordability; (4) Risks and responsibilities that lawyers may bear; (5) The lawyer's social reputation and working level.